Telegraphic transmitter.



No. 879,711. PATENTED FEB. 18. 1908. G. WILLIAMS, PLB. MITCHELL & S.HATHAWAY.

2 SHEETSSHEET l.

.16-L n I m a 27 J3 11- 55555 Q IHQEFTQ E v Qua/QM THE NORRIS PETERSco., wasmucrozy, D. c.

G. WILLIAMS, P. B. MITCHELL 8: S.

PATENTED FEB, 18, 1908. HATHAWAY.

TELEGRAPHIG TRANSMITTER.

APPLIGA'IIION FILED MAY 6, 1907.

2 sHEETs-simm 2.

ruz NORRIS PETERS ca., wAsHmcmN, 0v 0.

UNITED STATES PATENT OFFICE.

CLYDE WILLIAMS, PORTER B. MITCHELL, AND SHARPE HATHAWAY, OF BARTON,OHIO.

TELEGRAPHIC TRANSMITTER.

Patented Feb. 18, 1908.

To all whom it may concern:

Be it known that we, CLYDE WILLIAMS, PORTER B. MITCHELL, and SHARPEHATHA- WAY, citizens of the United States of America, and residents ofBarton, county of Belmont, and State of Ohio, have invented certain newand useful Improvements in Telegraphic Transmitters, of which thefollowing is a specification.

Our invention relates to new and useful improvements in telegraphictransmitters, and it consists in the particular construction, arranement and combination of parts which will ereinafter be fully described.

The chief object of the invention is to provide a simple and efficienttelegraphic transmitter whereby a succession of Morse signals may beautomatically sent, and which consequently relieves the intense nervousstrain upon the operator which results from the operation of theordinary telegraphic key in rapid or prolonged sending.

A further object is to provide a transmitter in which the length of thedots and dashes and their rapidity of succession may be regulated byadjustment of parts. And a still further object is to provide atelegraphic transmitter in connection with which the usual telegraphicbattery is not required, the instrument receiving its electrical energyfrom the line wire to which it is connected by the ordinary contactplug.

In describing the invention in detail, reference is herein had to theaccompanying drawin s, forming a part of this specification, in whicFigure 1 is a top plan view of the invention; Fig. 2 is a frontelevation of the same; Fig. 3 is a diagrammatic view, showing thecircuit connections; and Fig. 4 is a perspective view of thelever-operated circuit breaker.

Referring to said drawings, in which like reference -numerals designatelike parts throughout the several views l indicates a base on which ismounted the working mechanism comprising the invention. Provided on saidbase 1 at a suitable point is a metallic block 2 having pivotallymounted thereon keys 3 and 4, which are normally held spread apart, asshown in Figs. 1 and 3, by means of a suitable spring 5. Said keys 3 and4 respectively rest against the points of set: screws 6 and 7 providedin suitably-located posts 8 and 9. The key 3 carries a contactpoint 10adapted to cooperate with a post 11, mounted upon the base, and the key4 carries a contact-point 12 adapted to co- Icgperate with a post 13,also mounted on said ase.

Binding-posts 14 and 15 are connected by wires 16 and 17 withthe-ordinary contactplug 18 which is adapted for insertion underneaththe ordinary'telegraph key or in the switch-board. The binding-post 15is connected by the wire 19 with the metallic block 2, and consequentlywith the keys 3 and 4 mounted on said block; and the block 2 isconnected by wire 20 with a pivoted lever, or circuit breaker, 21, thespring contact-plate 22 with which said lever cooperates being connectedby the wire 23 with the binding-post 14. The spring contact-plate 22 isconnected by wire 24 with said post 13, and the latter is also connectedby wire 25 with one pole of an electromagnet 26.

The key 4, which is employed only for transmitting dashes, when movedhorizontally against the post 13 completes an electric circuit betweenthe binding posts 14 and 15, said circuit comprising the wire 19, block2, key 4, post 13, and wires 24 and 23.

The armature 27 of the electromagnet is carried upon the end of one arm28 of an angular lever 29 which is pivotally mounted in a suit-ablemanner upon a block 30 stationed on said base 1. In the presentinstance, a pin or pivot 31 having its opposite ends pointed isprojected vertically through the angle of said lever, and one end ofsaid pivot is mounted in a socketed base 32, while the other end thereofis held in a socket in the point of a set-screw 33 which is projectedvertically through a horizontal lug 34 carried by a post 35. The 0posite arm 36 of said lever 29 lies horizontaFwith its end projectedbetween upright lugs 37 and 38 respectively carried by metallic plates39 and 40, the former of which is pivoted on the block 30 underneath thesocketed base 32, as shown. The plate 40 is mounted directly on theplate 39, being secured thereto by means of a setscrew 52. A tensionspring 41 connected at one end with the arm 28 of said lever 29 and atthe other end with an adjusting-screw 42 normally holds said leverwithdrawn with the armature 27 removed from the electromagnet 26, and atthe same time the oppo- 47 said spring being suitably mounted on theface of an upright metal post 48 which is connected by wire 49 with theswitch-arm 50 of an adjusting switch mounted on said base at a suitablepoint, the cooperating contacts 51 of said switch being connected bywires with said electromagnet 26, as shown. A circuit is thus formedbetween the binding posts 15 and 14 through said magnet when the key 3is held against the post 11, said circuit including the wire 19, key 3,post 11,

'wire 44, block 30, plate 39, spring 47, post 48, wire 49,switch-arm'50, contact 51, one of the wires leading from the adjustingswitch to the coils of the magnet, the coils of the magnet, the wire 25,post 13, and wires 24 and 23.

As is obvious, when the key 3 is held against the cooperating post 11,the circuit above mentioned is completed and the electromagnet 26 isenergized, causing the lever 29 to rock on its ivot, the armature 27being carried on t e arm 28 of said lever. When the armature movesforward toward the ma net, the arm 36 of said lever is thrown forwardagainst the upright lug 38 of the plate 40, and carries said late,together with the pivoted plate 39, to w ich said plate 40 is secured bymeans of the adjusting 52 hereinbefore mentioned, forward, breaking thecontact between the lug 45 and the spring 47, opening the electriccircuit and deenerglzing the magnet. Actuated by the spring 41, thelever 29 is immediately drawn back to its normal position, carryingtherewith the plates 39 and 40, and again making contact between theterminals 45 and 47 closing the electric circuit through the magnet.Thus it will be seen that as long as the key 3 is held against the post11 the circuit through said magnet is alternately opened and closed inrapid and regular succession, and a series of dots is automaticallytransmitted.

The speed and length of the dots may be regulated by adjusting the nut53 carried by a bolt 54 which is projected from the magnet through asupporting-post 55. The opposite end of said magnet being slidablymounted between the bifurcated upper end of said post 48, when the nut53 is manipulated the magnet moves toward or away from the armature 27,according to the direction given said nut. A spiral spring 56normallyholds said magnet thrust forward from the post 55, as shown. Thelength of the dots and the rapidity with which they may be sent may alsobe regulated by adjusting the plates 39 and 40 with relation to eachother so as to vary the width of the space between the lugs 37 and 38.As is obvious, the greater the distance between said lugs, the shorterwill be the distance to which said plates will be kicked by the arm 36of the lever 29 when the armature moves against the magnet, and,

consequently, the shorter will be the interval between the dots, owingto the short interval between the opening and closing of the circuitthrough the terminals 45 and 47.

In sending dashes, as is apparent, a distinct movement of the key 4 mustbe made for each impulse. Said key 4 may be employed as an ordinarytelegraphic key, if desired, it being adapted for sending either dots ordashes. The movement of said key is horizontal, however, instead ofvertical, as in the ordinary telegraphic key.

From the foregoing it will be seen that we provide an extremely simpleand eflicient device for the purpose mentioned; and, while we haveshown. the device in what we now consider to be its simplest form, it isobvious that various mechanical changes may be made in the constructionand arrangement of some of the parts without departing from the generalspirit or scope of the invention. Hence we do not desire to limitourselves to the precise construction and arrangement of parts hereinshown and described.

Having thus fully described our invention, what we claim as new anddesire to secure by Letters Patent is 1. In a telegraphic transmitter,an electromagnet, a block, a pair of horizontally moving spring pressedkeys ivoted on said block, a contact 0st for each ey, a pivotedspringheld angu .ar lever, an armature for said magnet carried on onearm of said lever, a pivot ed plate having an upright lug on its freeend, a second plate adjustably carried by said first plate and having anupright lug on its outer end, the other arm of said lever extendingbetween said upright lugs, a second upright lug carried by said firstnamed plate, a flexible spring having a contact point normally inengagement with said second lug of the first named plate, electricalconnections be- 'a pair of contact posts a block, a pivoted lever,having an armature, and 'a flexible spring carrying a contact point,sald block having a pair of keys pivoted thereto, means operated by saidlever and coacting with the contact point of said flexible spring forbreaking the circuit through said magnet, and

means whereby the distance traveled by said first named means in itsmovement may be varied.

3. In a telegraphic transmitter, electric circuits including anelectro-magnet, a spring held pivoted armature-carrying lever, afieXible contact-point-carrying spring, keys and.

contact posts for the keys, a pivoted element coacting with saidcontact-point of the spring to make and break the circuit through saidmagnet, and adjustable means on said element for engagement with saidlever whereby the distance traveled by said element in its movement maybe varied.

4. In a telegraphic transmitter, electric circuits including anelectro-magnet, armature-carrying means, a contact point, keys andcontact posts for the keys, and a pivoted plate co-acting with saidcontact-point to make and break the circuit through the armature, saidplate having adjustable parts disposed on opposite sides of and operatedby said armature carrying means,- whereby the period of duration of thebreak may be varied.

5. In a telegraphic transmitter, electric circuits including anelectro-magnet, an armature-carrying spring-held lever, a contact point,keys and contact posts for the keys, a pivoted plate having a part forengagement with said contact point and a part for engagement with oneside of one of the arms of said lever, and a second plate movablysecured to the first plate and having a part for engagement with theopposite side of said lever arm.

6. In a telegraphic transmitter an electromagnet, a contact point, anarmature-carrying spring-held pivoted lever, keys and contact poststherefor all included in an electric circuit, a pivoted plate having apart to engage said contact point, and means borne by said plate toengage said lever whereby said plate is operated thereby, to break thecircuit through the magnet saidmeans being adjustable towards and awayfrom said lever so that the period of duration of such break may bevaried.

7. In a telegraphic transmitter, an electromagnet a contact point, aspring-held pivoted armature-carrying lever, keys and contact poststherefor, all of said parts being included in an electric circuit, andpivoted means having a part normally engaging said contact point andhaving means extending on opposite sides of one arm of said lever, andmeans whereby the distance between said last named means may be varied.

In testimony whereof We afiix our signatures in presence of tWowitnesses.

CLYDE WILLIAMS.

PORTER B. MITCHELL.

SHARPE HATHAWAY. Witnesses i 0. BABE, C. O. FLOWERS.

